Sturdy and better than expected. Im Dezember 2017 erwarb ich 4 Stück 8 TB Archive Modelle. sound quality not that good. None were damaged. I will be ordering only from the Rocket Dog company from now on! The head weight and construction make it a super stable shooter. )Ill close this review out with this. Great fit; comfortable; colorful and stylish. Here is a link to what appears to be the Birkenstock UK website page about sizing. Im generally happy with it but its not as high quality as Id expected and I thought it was a bit pricey for what it is.